▎ 摘　　要

NOVELTY - Preparation of graphene comprises dissolving graphene oxide in deionized water, and ultrasonically stripping to obtain graphene oxide solution; placing the solution in a glass container; connecting a negative electrode material and a positive electrode material with one end of a copper wire, placing the electrode in the solution, and connecting the other end of the copper guide wire with a negative electrode and a positive electrode of a direct-current voltage-stabilizing power supply; and powering on the power supply, and electrochemically reducing for 1-60 minutes. USE - Method for the preparation of graphene (claimed). ADVANTAGE - The method produces high quality graphene. It is simple and convenient, inexpensive, safe, and environment friendly. DETAILED DESCRIPTION - Preparation of graphene comprises: (A) dissolving graphene oxide with particle size of 25-140 mu m in deionized water, and ultrasonically stripping to obtain 5-10 mg/mL graphene oxide solution; (B) placing the graphene oxide solution in a glass container; (C) connecting a negative electrode material and a positive electrode material with one end of a copper wire, placing the electrode in the graphene oxide solution, and connecting the other end of the copper guide wire with a negative electrode and a positive electrode of a direct-current voltage-stabilizing power supply; and (D) powering on the power supply, controlling voltage at 10-50 V, controlling temperature at 25-90 degrees C, and electrochemically reducing for 1-60 minutes.